but why cant you take them self employed?
Spoke about this with Inland Revenue in some depth, found it wasn't worth having someone as self employed if you pay them. The IR want to make sure the person you are supplying work to is well looked after, ie sick pay, and all the other benefits of being employed.
They said if there is 'mutual dependancy' i.e. you rely on each other, you should be employing them.
However if the customer is paying each person directly, then each is effectively a sole trader. You are not responsible for actually paying the person working with you.
Example, you clean a house that is £30.00, you ask the customer to write a cheque for £20.00 for you, and a cheque for £10.00 to the other person. You call the shots, but each gets paid individually.
It's definately worth getting an accountant to sort all of these issues out. The amount they will save you on your tax bill will easily make up for their bill!